Question: A dollar bill serial number is a 1 0 - character string that starts with a letter from the 1 2 element set { A

A dollar bill serial number is a 10-character string that starts with a letter from the 12element set
{A,B,C,D,E,F,G,H,I, J,K,L}followed by an 8-digit string (each digit from the set of 10digits
{0,1,2,3,4,5,6,7,8,9}and the 10th character with a letter or a star from the 25element set:
{A,B,C,D,E,F,G,H,I, J,K,L,M,N,P,Q,R,S,T,U,V,W,X,Y,*}.
How many serial numbers are palindromes?

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